//
//  VisitorView.swift
//  sinaWB
//
//  Created by 杨运旺 on 15/11/8.
//  Copyright © 2015年 杨运旺. All rights reserved.
//

import UIKit
import SnapKit

/// 访客视图的协议
protocol VisitorViewDelegate : NSObjectProtocol{
    /// 注册
    func visitorViewDidRegister()
    /// 登录
    func visitorViewDidLogin()
}



/// 访客视图 － 处理用户未登录的界面显示
class VisitorView: UIView {
    /// 代理
    weak  var delegate : VisitorViewDelegate?
    
    // MARK: - 监听方法
    @objc private func clickLogin(){
        delegate?.visitorViewDidLogin()
    }
    
    @objc private func clickRegister(){
        delegate?.visitorViewDidRegister()
    }
    
    
    // MARK: - 设置视图信息
    /// 设置视图信息
    ///
    /// - parameter imageName: 图片名称，首页设置为 nil
    /// - parameter title:     消息文字
    
    func setupInfo(imageName:String?,title:String){
        
        messageLabel.text = title
        // 如果图片名称为 nil，说明是首页，直接返回
        guard let imgName = imageName else{
            startAnim()
            return
        }
        iconView.image = UIImage(named: imgName)
        // 隐藏小房子
        homeIconView.hidden = true
        
        // 将遮罩图层放置到底层
        sendSubviewToBack(maskIconView)

    }
    
    /// 开启首页转轮动画
    private func startAnim(){
        
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 20
        // 用在不断重复的动画上，当动画绑定的图层对应的视图被销毁，动画会自动被销毁
        anim.removedOnCompletion = false
        // 添加到图层
        iconView.layer.addAnimation(anim, forKey: nil)
        
    }
    
    // MARK: - 构造函数
    //initWithFrame 是 UIView 的指定构造函数
    // 使用纯代码开发使用的
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
    }
    // initWithCoder - 使用 SB & XIB 开发加载的函数
    // 使用 sb 开始的入口
    required init?(coder aDecoder: NSCoder) {
        // 导致如果使用 SB 开发，调用这个视图，会直接崩溃
        // fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        setupUI()
    }
    
    
    // MARK: - 懒加载控件
    ///  图标
    private lazy var iconView: UIImageView = UIImageView (imgName: "visitordiscover_feed_image_smallicon")
    /// 遮罩图层
    private lazy var maskIconView:UIImageView = UIImageView(imgName:"visitordiscover_feed_mask_smallicon")

    /// 小房子
    private lazy var homeIconView: UIImageView = UIImageView(imgName: "visitordiscover_feed_image_house")
    /// 消息文字
    private lazy var messageLabel: UILabel = UILabel(title: "关注一些人，回这里看看有什么惊喜")

    ///注册按钮
    private lazy var registerButton: UIButton = UIButton(title: "注册", color: UIColor.orangeColor(), backImage: "common_button_white_disable")

    
    /// 登录按钮
    private lazy var loginButton: UIButton = UIButton(title: "登录", color: UIColor.darkGrayColor(), backImage: "common_button_white_disable")
  
}

extension VisitorView{
    /// 设置界面
    private func setupUI(){
        // 1.添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(homeIconView)
        addSubview(messageLabel)
        addSubview(registerButton)
        addSubview(loginButton)
        // 2.设置自动布局

        for v in subviews{
            
            /**
            - 添加约束需要添加到父视图上
            - 建议，子视图最好有一个统一的参照物！
            */
            // translatesAutoresizingMaskIntoConstraints 默认是 true，支持使用 setFrame 的方式设置控件位置
            // false 支持使用自动布局来设置控件位置
            v.translatesAutoresizingMaskIntoConstraints = false
        }
        
//        // 1.图标
//        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterX, relatedBy: .Equal, toItem: self, attribute: .CenterX, multiplier: 1.0, constant: 0))
//        addConstraint(NSLayoutConstraint(item: iconView, attribute: .CenterY, relatedBy: .Equal, toItem: self, attribute: .CenterY, multiplier: 1.0, constant: -60))
            iconView.snp_makeConstraints { (make) -> Void in
                make.centerX.equalTo(self.snp_centerX)
                make.centerY.equalTo(self.snp_centerY).offset(-60)
        }
//        // 2> 小房子
//        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
//        addConstraint(NSLayoutConstraint(item: homeIconView, attribute: .CenterY, relatedBy: .Equal, toItem: iconView, attribute: .CenterY, multiplier: 1.0, constant: 0))
            homeIconView.snp_makeConstraints { (make) -> Void in
                make.center.equalTo(iconView.snp_center)
        }
//        // 3> 消息文字
//        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .CenterX, relatedBy: .Equal, toItem: iconView, attribute: .CenterX, multiplier: 1.0, constant: 0))
//        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Top, relatedBy: .Equal, toItem: iconView, attribute: .Bottom, multiplier: 1.0, constant: 16))
//        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 224))
//        addConstraint(NSLayoutConstraint(item: messageLabel, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        messageLabel.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(iconView.snp_bottom)
            make.centerX.equalTo(iconView.snp_centerX)
            make.width.equalTo(224)
            make.height.equalTo(36)
        }
//        // 4> 注册按钮
//        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Left, relatedBy: .Equal, toItem: messageLabel, attribute: .Left, multiplier: 1.0, constant: 0))
//        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
//        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
//        addConstraint(NSLayoutConstraint(item: registerButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
        registerButton.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(messageLabel.snp_bottom).offset(16)
            make.left.equalTo(messageLabel.snp_left)
            make.width.equalTo(100)
            make.height.equalTo(36)
        }
//        // 5> 登录按钮
//        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Right, relatedBy: .Equal, toItem: messageLabel, attribute: .Right, multiplier: 1.0, constant: 0))
//        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Top, relatedBy: .Equal, toItem: messageLabel, attribute: .Bottom, multiplier: 1.0, constant: 16))
//        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100))
//        addConstraint(NSLayoutConstraint(item: loginButton, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 36))
            loginButton.snp_makeConstraints { (make) -> Void in
                make.top.equalTo(registerButton.snp_top)
                make.right.equalTo(messageLabel.snp_right)
                make.size.equalTo(registerButton.snp_size)
        }
//        // 6> 遮罩图层
//        /**
//        VFL : 可视化格式语言
//        
//        H 水平方向
//        V 垂直方向
//        | 边界
//        [] 包装控件
//        views: 是一个字典 [名字: 控件名] - VFL 字符串中表示控件的字符串
//        metrics: 是一个字典 [名字: NSNumber] - VFL 字符串中表示某一个数值
//        */
//        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-0-[mask]-0-|", options: [], metrics: nil, views:["mask":maskIconView]))
//        addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-0-[mask]-(-36)-[regButton]", options: [], metrics: nil, views: ["mask":maskIconView,"regButton":registerButton]))
                maskIconView.snp_makeConstraints { (make) -> Void in
                    make.top.equalTo(snp_top)
                    make.left.equalTo(snp_left)
                    make.right.equalTo(snp_right)
                    make.bottom.equalTo(registerButton.snp_bottom)
                }

//        // 设置背景颜色 - 灰度图 R = G = B，在 UI 元素中，大多数都使用灰度图，或者纯色图(安全色)
        backgroundColor = UIColor(white: 237.0 / 255.0, alpha: 1.0)
//
        //3.设置监听方法
        registerButton.addTarget(self, action: "clickRegister", forControlEvents: .TouchUpInside)
        loginButton.addTarget(self, action: "clickLogin", forControlEvents: .TouchUpInside)
    }
}